cmd/screentest: avoid racing on screenshot errors

testcase.run starts concurrent goroutines to capture the test and want
screenshots, but both goroutines previously assigned to the same named
return variable err. This caused a data race and could result in an
incorrect error being returned.

Keep the screenshot and error variables local to each goroutine,
and assign the outer screenshot variables only after a successful
capture.

Add regression tests covering failures from either screenshot and
failures from both screenshots.

Fixes golang/go#80763

Change-Id: Id216f1e8ac2ecc91e9091817d9fca6c3ecc26ee0
Reviewed-on: https://go-review.googlesource.com/c/website/+/811480
Auto-Submit: Ethan Lee <ethanalee@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Ethan Lee <ethanalee@google.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2 files changed
tree: 55e4a73c20954d73f3985504d1fb162dbbac47bf
  1. _content/
  2. cmd/
  3. internal/
  4. tour/
  5. .eslintrc.yaml
  6. .gitattributes
  7. .prettierrc.yaml
  8. .stylelintrc.yaml
  9. codereview.cfg
  10. content.go
  11. content_test.go
  12. CONTRIBUTING.md
  13. go-app-deploy.sh
  14. go.mod
  15. go.sum
  16. jest-transform.cjs
  17. LICENSE
  18. npm
  19. npx
  20. package-lock.json
  21. package.json
  22. PATENTS
  23. README.md
  24. tsconfig.json
README.md

Go website

Go Reference

This repo holds content and serving programs for the go.dev and golang.org web sites.

Content is in _content/ (go.dev) and tour/ (go.dev/tour). Server code is in cmd/ and internal/.

To run the combined go.dev+golang.org server to preview local content changes, use:

go run ./cmd/golangorg

The supporting programs cmd/admingolangorg and cmd/googlegolangorg are the servers for admin.golang.org and google.golang.org. (They do not use the _content/ directories.)

Each command directory has its own README.md explaining deployment.

JS/TS/CSS Formatting

This repository uses eslint to format JS and TS files, and stylelint to format CSS files.

See also:

It is encouraged that all JS, TS, and CSS code be run through formatters before submitting a change. However, it is not a strict requirement enforced by CI.

Installing npm Dependencies:

  1. Install docker
  2. Create a .gitignore file at repo root
  3. Add .gitignore and node_modules to .gitignore
  4. Run ./npm install

Run ESlint

./npx eslint [options] [file] [dir]

Run Stylelint

./npx stylelint [input] [options]

TypeScript Support

TypeScript files served from _content are transformed into JavaScript. Reference .ts files in html templates as module code.

<script type="module" src="/ts/filename.ts">

Write unit tests for TypeScript code using the jest testing framework.

Run Jest

./npx jest [TestPathPattern]

Deploying

Each time a CL is reviewed and submitted, the code is deployed to App Engine. See cmd/golangorg/README.md for details.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://go.dev/doc/contribute.

The git repository is https://go.googlesource.com/website.

The main issue tracker for the website repository is located at https://go.dev/issues. Prefix your issue with “x/website:” in the subject line, so it is easy to find.